Derrick



April 24, 1928'.

N. B. BIGGS DERRICK Filed July 28, 1925 INVENTOR [Voafi 3.5 295,

ATTORNEYS PatentedApr. 24, 1928.

PNIT I S], A NT OFFICE, p

mm nnmman Brass, or wroHrrA,' A SAs ASsIGN R "r rnn n Q. ANTHONY, or

-WICHITA, KANSAS,

DERRICK. 2

Application filed July 28. 1925. :Serial No. 46,666.

tions and formed of a plurality of elements which are interchangeable inthe various sectionsfor constructing the derrick of any desired height,I

This invention will be best understood from a consideration of thefollowing detailed description, in view of the accom-' panying drawingforming apart of the specification; nevertheless it is to be understoodthat the invention is not confined to the disclosure, being susceptibleof such changes and modifications which shall define no materialdeparture from the salient features of the invention as expressed in andlower portions and adjacent the'outer the appended claims.

In the drawings:

Figure 1 is a side view indetail of a form of connecting means for thegirders and corner posts. v a

Figure 2 is a vertical section of the device shown in Figure 1.

Figure 3 is a horizontal section of the connecting means shown inFigures 1 and 2 taken along the line 33 of Figure 1.

Figure 4 is a view in perspective of the T-plate.

Figure 5 is a side elevation in detail of another form of the connectingmeans for the corner posts and girders.

Figure 6 is a plan view of the same.

Referring to Figures 1 to 4 inclusive a pair of corner posts 1 are shownin abutting relation sockets of a key plate 20. Said key plate isprovided with a pair of walls 21 and 22 connected together ata corner ofthe key plate and projectingabove and below the upper and lower surfacesof said plate and integrally formed with two adjacent edges.

of said plate. The opposite adjacent edges are provided with keys 23 and24 which project above and below the surfaces of the plate with theinner wall of the keys behaving their ends located in mg flush with anedge of the plate 20 so '2 that the keys project'beyond said edges ofthe plate. The key plate and abutting ends, of the post 1 are embracedby a gusset plate 25 having a pair of side walls 26 and 27 located atright angles to each other. The said side walls are provided withopenings' 28 and 28 adapted to receive either of the keys 23 or 24.

A U-shaped bracket 29 is secured to each face 26 or 27- of the gussetplate25 adjacent their outer edges and are adapted to receive v the endsof a girder 29. 'A stop 30 is secured adjacent the inner edge of eachwall of the gusset plate and adapted to receive the inner end inabutting relation of the girders '29. It will also be noted that theU-shaped bracket or guide 29 has its outwardly projecting sides 31located at an acute angle to the horizontal so'that when the girders 29are placed in position the girders will be located at an acute an'gle tothe"hori-.

zontal; The stops 30 are provided with a Ii 32 adapted to engage over agirder 29 an maintain the same in position. The side walls 26 and 27 attheir 'upper free'edges of the side walls are formed 'elon-' besecuredto the side walls inany' approved manner. The upper portion of theconnection between the side plates 26 and 27 of the gusset plate 25 iscut away as shown at to form a slot to receive a bolt 36, the bolt beingpassed through a diagonally disposed passage in one of the corner posts1.

Referring to Figures 5 and 6 the key plate shown in the previous figuresis likewise employed with the gusset plate 25, the gusset plate beingprovided with the usual elongated slots 33 and a slot 35 to receive abolt 36 which passes through the slot and diagonally through a cornerpost 1. A sheath 40 is secured at its opposite ends to the side plates26 and 27 of the gussetv plate 25 and has an angular connecting memberas shown at 41' for receiving the ends of the girders, 29. The sheathcomprises a topplate 42 and side walls or flanges 43 which space the topplate from the walls of the gusset plate 25' to receive the girders 29.The keys 23 and 24 are received within openings 28" in the side walls ofthe gusset plate.

What I claim is:

1. An element of a derrick construction comprising means for securingthe abutting ends of corner posts'and girders in lockedrelationandcoinprising an angle iron having a pair of side wallsdisposed at right angles to each other, stops secured to the out erfaces of the Walls, a bracket secured to each Wall adapted to receivethe end of a girder with the end of the girder abutting the stops, and akey plate received between the walls of the angle iron and havingsockets at its opposite faces to receive the abutting ends of the cornerposts, and complementary means included in the angle iron and key platefor maintaining the relative position of the plate and angle iron.

2. An element of a derrick construction comprising means for securingthe abutting ends of corner posts and girders in locked relation andcomprising an angle iron having a pair of side Walls disposed at rightan gles to each other, stops secured to the outer faces of the walls, abracket secured to each wall adapted to receive the end of a girder withthe end of the girder abutting the stops, and a key plate receivedbetween the walls of the angle iron and having sockets at its oppositefaces to receive the abutting ends of the corner posts, said key platebeing provided with lugs secured to a pair of its adjacent edges andprojecting from opposite sides of the plate, the walls of the angle ironbeing provided with openings to receive the lugs of the key plate.

3. An element of a derrick construction comprising means for securingthe abutting ends of: corner posts and girders in locked relation andcomprising an angle iron having a pair of side walls disposed at rightangles to each other, stops secured to the outer faces of the Walls, abracket secured to each wall adapted to receive the end of a girder withthe end of the girder abutting the stops, a key plate received betweenthe Walls oflthe angle iron and having sockets at its opposite faces toreceive the abutting ends of the corner posts, the brackets on the sidewalls being located above the stops whereby the girders are supported atan angle to the horizontal.

4. An element of a derrick construction con'lprising means for securingthe abutting ends of corner posts and girders in locked relation andcomprising an angle iron having a pair of side walls disposed at rightangles to each other, stops secured to the outer faces of the walls, abracket secured to each wall adapted to receive the end of a girder withthe end of the girder abutting the stops,

and a key plate received between the Walls 5. An element of a derrickconstruction comprising an angle ironplate having a pair of walls atright angles to each other, said side walls being provided withelongated slots, a key plate interposed between the op posite ends ofthe angle irons andadapted to receive the abutting ends of corner posts,keys projecting from the adjacent edges of the key plate and adapted tobe seated within the slots in the side walls of the angle irons, asheath provided with pairs of laterally projecting flanges secured toeach side Wall of the angle iron and to receive the adjacent ends of apair of abutting girders.

NOAH. BENJIMAN BIGGS

